Zigzag Edges Toothed Log Periodic Terahertz Antenna Design Based on Graphene Hilbert Curve AMC

Abstract

In this work, a novel zigzag edge toothed log-periodic antenna (ZETLPA) placed over Hilbert curve Graphene AMC is proposed for frequency band (0.1 –10) terahertz. The bandwidth and operating frequency bands of the antenna have changed by varying the applied DC voltage source. This leads to change the chemical potential of the Graphene and hence changing its surface conductivity. The antenna radiating element of the ZETLPA is made from gold patch placed on Hilbert curve shape Graphene AMC. An Exponential taper is employed for the matching process over the antenna bandwidth. The antenna simulated by CST 2016 package (Computer Simulation Technology). The results show that 100 % of the bandwidth obtained (S11 < −10 dB) when the chemical potential of the Graphene equal to 1eV. A zigzag edges TLP is used to increase the antenna arms lengths and reduce the return losses to a minimum level as possible over the required frequency band.